TeraFlex JT: Alpine IR Control Arms provide complete alignment adjustability for maximum performance on JT Gladiator models with 0-4. 5” lifts. Uses factory control arm brackets. Includes our innovative IR (Independent Rotation) Bushings. Can be added to any existing suspension lift. Fits: JT Gladiator (pickup) 0-4. 5” Lift Control Arm Specs: Tube Diameter & Wall = 42mm x 4mm Factory Length = 16-3/8” Min. Length = 16-1/8” Max. Length = 17-3/8” Both Ends = 16mm Bolt Includes: Alpine IR Control Arm – Adjustable: Driver Rear Upper (# XXXXXXX) Passenger Rear Upper (# XXXXXXX) Features & Benefits: Durable 42mm x 4mm wall DOM (Drawn Over Mandrel) tube provides maximum strength Adjustable Alpine IR Control Arms optimize caster angle and tune anti-squat geometry for proper suspension alignment Re-centers axles in the wheel well for proper suspension movement. Can also be used to increase wheelbase Full range of movement will not restrict articulation or flex off-road Innovative, maintenance-free, IR (Independent Rotation) Bushings provide unrestricted rotation and flex as well as excellent NVH damping and ride quality characteristics Zero maintenance forged threaded joints for smooth quiet flex Premium black e-dipped coating provides superior durability and corrosion resistance on tube and forged rod end housing Anodized 6061-T6 aluminum clamp collar to secure rod end after length adjustment TeraFlex Lifetime against defects Note(s): Alignment required. Install Time: 2 Hours Configurations: Alpine IR Control Arm Kit – 8-Arm Adjustable: (# 1417550) Front Upper (# 1416530) – pair Front Lower (# 1416550) – pair Rear Upper (# 1417580) – pair Rear Lower (# 1417590) – pair